import java.util.concurrent.Callable;

public class Demo33 {

    private static int result;

    public static void main(String[] args) throws InterruptedException {
        Thread t=new Thread(()->{
           int sum=0;
            for (int i = 0; i < 1000; i++) {
                sum+=i;
            }
            result=sum;
        });
        t.start();
        t.join();

        System.out.println("result= "+result);
    }

}
